The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values).
Questions tagged [nsnull]
82 questions
0
votes
1 answer
ios: NSNull lldb error when using substringToIndex
I have the following code:
NSString *subtitleFull = [dictionary valueForKey:@"distance"];
NSString *subtitle = [subtitleFull substringToIndex:2];
When I run the code I get the following error:
…
wwjdm
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0
votes
1 answer
Objective C setter in superclass called instead of subclass
I am trying to subclass UILabel so the setter setText check for null to avoid this if the supplied parameter is a NSNULL:
[NSNull isEqualToString:]: unrecognized selector sent to instance
The code is as below. I stepped through in a debugger and…
NaN
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1 answer
How should I tidy up this code:
if ([dictInfoForThisBusiness[@"LikeNumber"] isNotEmpty]) {
BusinessToSave.numberOfLike =dictInfoForThisBusiness[@"LikeNumber"];
}
else
{
BusinessToSave.numberOfLike = @(0);
}
if (dictInfoForThisBusiness[@"DislikeNumber"])
{
…
user4234
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0
votes
2 answers
How to remove 's from NSDictionary?
I'm trying to use the writeToFile method of an NSArray of NSDictionaries which doesn't allow nulls. I figured just loop through and find them and replace with empty NSString's but I can't get it to work. This is what I'm trying.
EDIT: The NSArrays…
TijuanaKez
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-1
votes
3 answers
NSNull length crash with textField,
when i enter any character or number with keyboard.the app crash with this info
"Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[NSNull length]: unrecognized
selector sent to instance 0x103b5daf0'".
And every…
-1
votes
1 answer
Replacing NSNulls inside NSDictionary
this question is similar to Replace occurrences of NSNull in nested NSDictionary
In swift I am getting an error (I believe because of NSNull's) I don't really care if the NSNull becomes an empty string or a nil. I am just wanting to get the code to…
Brandon Sturgeon
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votes
2 answers
NSMutableArray Crash When checking for count
I'm using NSMutableArray with object name myArray : When there is no data from server My mutable array print
In next line of code if check for count it crashes. How to resolve this please help me.
NSLog(@"Print Array : %@", myArray);
…
nikhil challagulla
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